grub menu can't be dispalyed

Question

I have installed Ubuntu 14.04 along aside Windows 10. While booting Ubuntu is not appearing instead its directly opening the Windows os. The grub menu is not found, its hidden.

Answer 1

I can present to you a simple hack for this problem, use it if none of the legit solutions solved your problem. I am assuming you have a UEFI boot system.

As Windows keeps changing the boot order, the hack is to trick Windows to recognize Ubuntu grub as Windows boot file i.e. bootmgfw.efi

Part 1: Accessing EFI folder on Windows

Open cmd as administrator and mount the EFI folder to access it. Execute the following commands one bye one. Below I have assigned letter g to the mount, make sure you assign a unassigned letter in your PC.

mountvol g: /s
g:
cd EFI\

You should see a Microsoft folder and Ubuntu folder within EFI.

Part 2: Copy grubx64.efi from Ubuntu to Microsoft\Boot\ as bootmgfw.efi

First create a backup of bootmgfw.efi

cd Microsoft\Boot\
rename bootmgfw.efi bootmgfw_.efi

Now do the copy and rename.

copy g:\EFI\ubuntu\grubx64.efi g:\EFI\Microsoft\Boot\
rename grubx64.efi bootmgfw.efi

Part 3: Unmount the EFI folder

Execute the following commands one by one.

c:
mountvol g: /d

Now reboot your PC and you should see Ubuntu grub load up which should have and option Windows UEFI loader to boot Windows as well.

Hope I was helpful.

Answer 2

If you hold in the shift key while booting the GRUB menu should load. Choose Ubuntu.

To change the boot time from 0 seconds to 10 or so once in Ubuntu run in terminal:

sudo gedit /etc/default/grub

Edit these two lines to look like this:

GRUB_HIDDEN_TIMEOUT=10
GRUB_HIDDEN_TIMEOUT_QUIET=false
GRUB_TIMEOUT=10

replace the 10's with the timeouts desired.

After this you must run this to apply changes:

sudo update-grub

Hope this is helpful!